package com.efuture.chapterthree

/* @Description: 先决条件函数
 * @Auther: zhaoshanshan
 * @Date: 2022/03/04/11:20 下午
 */
fun main() {
    var name:String?=null;
    var flag:Boolean = false;
    //checkNotNull(name)
    //requireNotNull(name)

    //require(flag)
}